Initial commit

Author: rameel

.editorconfig

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+root = true
+
+[*]
+charset = utf-8
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{yml,props,targets,csproj}]
+indent_size = 2
+
+# IDE0079: Remove unnecessary suppression
+dotnet_remove_unnecessary_suppression_exclusions = category:ReSharper
+
+# IDE0079: Remove unnecessary suppression
+# dotnet_diagnostic.IDE0079.severity = none
+
+# CA2255: The 'ModuleInitializer' attribute should not be used in libraries
+dotnet_diagnostic.CA2255.severity = none
+
+# CS8600: Converting null literal or possible null value to non-nullable type.
+dotnet_diagnostic.CS8600.severity = error
+
+# CS8601: Possible null reference assignment.
+dotnet_diagnostic.CS8601.severity = error
+
+# CS8602: Dereference of a possibly null reference.
+dotnet_diagnostic.CS8602.severity = error
+
+# CS8603: Possible null reference return.
+dotnet_diagnostic.CS8603.severity = error
+
+# CS8604: Possible null reference argument.
+dotnet_diagnostic.CS8604.severity = error
+
+# CS8610: Nullability of reference types in type of parameter doesn't match overridden member.
+dotnet_diagnostic.CS8610.severity = error
+
+# CS8613: Nullability of reference types in return type doesn't match implicitly implemented member.
+dotnet_diagnostic.CS8613.severity = error
+
+# CS8614: Nullability of reference types in type of parameter doesn't match implicitly implemented member.
+dotnet_diagnostic.CS8614.severity = error
+
+# CS8618: Non-nullable field is uninitialized. Consider declaring as nullable.
+dotnet_diagnostic.CS8618.severity = error
+
+# CS8619: Nullability of reference types in value doesn't match target type.
+dotnet_diagnostic.CS8619.severity = error
+
+# CS8620: Argument cannot be used for parameter due to differences in the nullability of reference types.
+dotnet_diagnostic.CS8620.severity = error
+
+# CS8625: Cannot convert null literal to non-nullable reference type.
+dotnet_diagnostic.CS8625.severity = error
+
+# CS8634: The type cannot be used as type parameter in the generic type or method. Nullability of type argument doesn't match 'class' constraint.
+dotnet_diagnostic.CS8634.severity = error
+
+# CS8643: Nullability of reference types in explicit interface specifier doesn't match interface implemented by the type.
+dotnet_diagnostic.CS8643.severity = error
+
+# CS8653: A default expression introduces a null value for a type parameter.
+dotnet_diagnostic.CS8653.severity = error
+
+# CS8714: The type cannot be used as type parameter in the generic type or method. Nullability of type argument doesn't match 'notnull' constraint.
+dotnet_diagnostic.CS8714.severity = error
+
+# IDE0059: Unnecessary assigment of a value
+dotnet_diagnostic.IDE0059.severity = none
+
+# IDE0060: Remove unused parameter
+dotnet_diagnostic.IDE0060.severity = none

.github/workflows/publish.yml

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+name: Publish
+
+on:
+  push:
+    tags:
+      - "[0-9]+.[0-9]+.[0-9]+"
+      - "[0-9]+.[0-9]+.[0-9]+-[a-z]+.[0-9]+"
+
+permissions:
+  contents: write
+
+jobs:
+  publish:
+    name: Publish packages
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Install .NET
+        uses: actions/setup-dotnet@v4
+        with:
+          dotnet-version: 9.0.x
+
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Build Solution
+        run: dotnet build -c Release -p:SkipInternalsVisibleTo=true
+
+      - name: Create NuGet Packages
+        run: dotnet pack -c Release -o ./nuget --no-build
+
+      - name: Publish NuGet Packages
+        run: dotnet nuget push ./nuget/*.nupkg --api-key ${{secrets.NUGET_API_KEY}} --skip-duplicate -s https://api.nuget.org/v3/index.json
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          draft: true
+          files: nuget/*

.github/workflows/test.yml

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+name: Build & Test
+
+on:
+  pull_request:
+    branches: [main]
+
+jobs:
+  build-and-test:
+    name: "Test projects"
+    runs-on: ubuntu-latest
+    steps:
+    - name: Install .NET
+      uses: actions/setup-dotnet@v4
+      with:
+        dotnet-version: |
+          6.x
+          7.x
+          8.x
+          9.x
+
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Test Projects (Debug)
+      run: dotnet test -c Debug
+
+    - name: Test Projects (Release)
+      run: dotnet test -c Release

.gitignore

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+#Ignore thumbnails created by windows
+[Tt]humbs.db
+
+#Ignore files build by Visual Studio
+*.obj
+*.exe
+*.pdb
+*.user
+*.patch
+*.aps
+*.pch
+*.vspscc
+*_i.c
+*_p.c
+*.ncb
+*.suo
+*.tlb
+*.tlh
+*.bak
+*.cache
+*.ilk
+*.log
+*.lib
+*.sbr
+*.cs.ide
+[Dd]ebug*/
+[Rr]elease*/
+bin/
+obj/
+.vs/
+.vscode/
+*.ReSharper
+*.ReSharper.user
+[Tt]est[Rr]esult*
+
+#Ignore Rider/Idea files
+.idea/

Directory.Build.props

@@ -0,0 +1,5 @@
+<Project>
+  <PropertyGroup>
+    <AccelerateBuildsInVisualStudio>true</AccelerateBuildsInVisualStudio>
+  </PropertyGroup>
+</Project>

Directory.Packages.props

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+<?xml version="1.0" encoding="utf-8"?>
+<Project>
+  <PropertyGroup>
+    <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.12.0" />
+    <PackageVersion Include="Microsoft.SourceLink.GitHub" Version="8.0.0" />
+    <PackageVersion Include="MinVer" Version="6.0.0" />
+    <PackageVersion Include="NUnit" Version="4.3.2" />
+    <PackageVersion Include="NUnit3TestAdapter" Version="4.6.0" />
+    <PackageVersion Include="Ramstack.Parsing" Version="1.0.0-beta.5" />
+  </ItemGroup>
+</Project>

LICENSE

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+MIT License
+
+Copyright 2024 Rameel (https://github.com/rameel)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

README.md

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+# Ramstack.ExpressionParser
+[![NuGet](https://img.shields.io/nuget/v/Ramstack.ExpressionParser.svg)](https://nuget.org/packages/Ramstack.ExpressionParser)
+[![MIT](https://img.shields.io/github/license/rameel/ramstack.expressionparser)](https://github.com/rameel/ramstack.expressionparser/blob/main/LICENSE)
+
+**Ramstack.ExpressionParser** is a flexible expression parser library for .NET,
+allowing dynamic evaluation and binding of expressions with context-aware support.
+
+## Getting Started
+
+To install the `Ramstack.ExpressionParser` [NuGet package](https://www.nuget.org/packages/Ramstack.ExpressionParser) to your project, run the following command:
+```shell
+dotnet add package Ramstack.ExpressionParser
+```
+
+## Usage
+
+```csharp
+var result = ExpressionParser.Parse("math.min(2 + 3, 2 * 3)");
+if (result.Success)
+{
+    var lambda = Expression.Lambda<Func<int>>(result.Value);
+    var fn = lambda.Compile();
+
+    Console.WriteLine(fn());
+}
+```
+
+### Using `ContextAwareBinder`
+
+`ContextAwareBinder` allows binding expressions to a specific context,
+making it possible to reference its properties, fields, and methods directly within expressions.
+
+- The provided context acts as an implicit **this**, meaning you can access its members without prefixes.
+- Case-insensitive binding: identifiers in expressions are resolved in case-insensitive manner (e.g., level, Level, and LEVEL are treated the same).
+
+```csharp
+var parameter = Expression.Parameter(typeof(LogEvent), "logEvent");
+var binder = new ContextAwareBinder(parameter);
+
+var result = ExpressionParser.Parse("level == LogLevel.Error && string.IsNullOrEmpty(source)", binder);
+var predicate = Expression
+    .Lambda<Predicate<LogEvent>>(result.Value, parameter)
+    .Compile();
+```
+
+Here, `IsEnabled` evaluates the parsed expression against a `LogEvent` instance:
+```csharp
+public bool IsEnabled(LogEvent logEvent)
+{
+    return _predicate(logEvent);
+}
+```
+
+This makes it easy to create dynamic, human-readable expressions for filtering or evaluating objects at runtime.
+
+## Supported Versions
+
+|      | Version    |
+|------|------------|
+| .NET | 6, 7, 8, 9 |
+
+## Contributions
+
+Bug reports and contributions are welcome.
+
+## License
+
+This package is released under the **MIT License**.
+See the [LICENSE](https://github.com/rameel/ramstack.expressionparser/blob/main/LICENSE) file for details.

Ramstack.ExpressionParser.sln

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+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.14.35806.103
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = ".root", ".root", "{02EA681E-C7D8-13C7-8484-4AC65E1B71E8}"
+	ProjectSection(SolutionItems) = preProject
+		.editorconfig = .editorconfig
+		.gitignore = .gitignore
+		Directory.Build.props = Directory.Build.props
+		Directory.Packages.props = Directory.Packages.props
+		LICENSE = LICENSE
+		README.md = README.md
+	EndProjectSection
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ramstack.ExpressionParser", "src\Ramstack.ExpressionParser\Ramstack.ExpressionParser.csproj", "{7866E867-7E25-1EE9-245D-E1DC9EA701B7}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "Ramstack.ExpressionParser.Tests", "tests\Rmastack.ExpressionParser.Tests\Ramstack.ExpressionParser.Tests.csproj", "{0DCB3293-053C-4A79-BD06-CD6872911886}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Release|Any CPU = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{7866E867-7E25-1EE9-245D-E1DC9EA701B7}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7866E867-7E25-1EE9-245D-E1DC9EA701B7}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7866E867-7E25-1EE9-245D-E1DC9EA701B7}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7866E867-7E25-1EE9-245D-E1DC9EA701B7}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0DCB3293-053C-4A79-BD06-CD6872911886}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0DCB3293-053C-4A79-BD06-CD6872911886}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0DCB3293-053C-4A79-BD06-CD6872911886}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0DCB3293-053C-4A79-BD06-CD6872911886}.Release|Any CPU.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {52EB8838-9A24-4543-99E9-9CE702252080}
+	EndGlobalSection
+EndGlobal

src/Ramstack.ExpressionParser/Binder.cs

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+using System.Linq.Expressions;
+using System.Reflection;
+
+namespace Ramstack.Parsing;
+
+/// <summary>
+/// Provides an abstract base class for binding expressions.
+/// </summary>
+public abstract class Binder
+{
+    /// <summary>
+    /// Gets the expression context associated with this binder instance.
+    /// </summary>
+    public virtual Expression? Context => null;
+
+    /// <summary>
+    /// Resolves the type associated with the specified name.
+    /// </summary>
+    /// <param name="name">The <see cref="Identifier"/> representing the name of the requested type.</param>
+    /// <returns>
+    /// The <see cref="Type"/> instance corresponding to the specified <paramref name="name"/> 
+    /// if resolved successfully; otherwise, <see langword="null"/>.
+    /// </returns>
+    public abstract Type? BindToType(Identifier name);
+
+    /// <summary>
+    /// Attempts to bind to a method based on the specified type, method name, and parameter types.
+    /// </summary>
+    /// <param name="type">The <see cref="Type"/> from which to select the method.</param>
+    /// <param name="methodName">The <see cref="Identifier"/> representing the name of the method to bind.</param>
+    /// <param name="parameterTypes">An array of <see cref="Type"/> objects representing
+    /// the types of arguments passed to the method.</param>
+    /// <param name="isStatic">A <see cref="bool"/> indicating whether to match only static methods
+    /// (<see langword="true"/>) or instance methods (<see langword="false"/>).</param>
+    /// <returns>
+    /// A <see cref="MethodInfo"/> representing the matching method if found;  otherwise,
+    /// <see langword="null"/> if no suitable method is identified.
+    /// </returns>
+    public abstract MethodInfo? BindToMethod(Type? type, Identifier methodName, Type[] parameterTypes, bool isStatic);
+
+    /// <summary>
+    /// Attempts to bind to a member (field, property, or method) based on the specified type and member name.
+    /// </summary>
+    /// <param name="type">The <see cref="Type"/> from which to select the member.</param>
+    /// <param name="memberName">The <see cref="Identifier"/> representing the name of the member to bind.</param>
+    /// <param name="isStatic">A <see cref="bool"/> indicating whether to match only static members
+    /// (<see langword="true"/>) or instance members (<see langword="false"/>).</param>
+    /// <returns>
+    /// A <see cref="MemberInfo"/> representing the matching member if found; otherwise,
+    /// <see langword="null"/> if no suitable member is identified.
+    /// </returns>
+    public abstract MemberInfo? BindToMember(Type? type, Identifier memberName, bool isStatic);
+}